bolts › machine bolts
MS9557-40
Military Standard Bolt
Description
Fastener Length: 3-1/2", Thread: 1/4-28, Thread Length: 3/4"
Specifications
| Extended Washer Diameter | 0.438 |
|---|---|
| Extended Washer Thickness | 0.060 |
| Fastener Length | 3.500 |
| Head Height | 0.300 |
| Head Style | Double hexagon extended washer |
| Length | 3 1/2 |
| Material | Iron |
| Material Specification | Ams 5731-85 assn std single material response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.750 |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNJF |
| Thread Size | 1/4 |
| Width Between Flats | 0.312 |
Cross-reference
No interchangeable or dimensionally similar parts are on record for MS9557-40. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error